Experimental Study of Natural Convection Heat Transfer from Horizontal Cylinder with Circular, Elliptical, and Cusp Cross Sectional Area

Three copper cylinder oriented geometries have been experimentally tested for heat transfer enhancement. These geometries include ellipse, squared cusp and triangle cusp cross section. The circular cross section was also tested for comparison purposes. The test specimens have been manufactured using different machining processes such as lathing, riming, grinding and drilling. The test specimens were rotated around their centers by several angles 45°, 60° and 90° to obtain the optimum position for good heat transfer enhancement. The results reveals that the standing ellipse and square cusp have the high heat transfer coefficient. The circular cross section was found to have the lower value of heat transfer coefficient.